Patents Assigned to TDK Corporation
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Publication number: 20240071692Abstract: A high voltage feed-through capacitor includes an element body, a first electrode, a second electrode and a through-conductor. The element body includes a first main surface and a second main surface facing away from each other. A through-hole is formed in the element body and opens in the first main surface and the second main surface. The first electrode is disposed on the first main surface. The second electrode is disposed on the second main surface. The through-conductor is inserted through the through-hole and electrically connected to the first electrode. An opening area of the through-hole in the second main surface is larger than an opening area of the through-hole in the first main surface.Type: ApplicationFiled: July 17, 2023Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Yuta KAMO, Hisashi TANAKA
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Publication number: 20240074323Abstract: A magnetic array includes: a plurality of magnetoresistance effect elements; and a pulse application device which applies a pulse to each of the plurality of magnetoresistance effect elements, wherein each of the plurality of magnetoresistance effect elements includes domain wall motion layer, ferromagnetic layer, and non-magnetic layer sandwiched between the domain wall motion layer and the ferromagnetic layer, wherein the pulse application device is configured to apply an initialization pulse and an operation pulse to each of the plurality of magnetoresistance effect elements, wherein the initialization pulse has a first pulse that is applied a plurality of times to spread a distribution of resistance values of the plurality of magnetoresistance effect elements from an initial distribution, and wherein a voltage of each first pulse is smaller than that of the operation pulse or each pulse length of the first pulse is shorter than that of the operation pulse.Type: ApplicationFiled: January 12, 2021Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Shogo YAMADA, Tatsuo SHIBATA
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Publication number: 20240074325Abstract: A magnetic domain wall moving element includes a first ferromagnetic layer, non-magnetic layer, second ferromagnetic layer, first magnetization fixed part, second magnetization fixed part, first surface layer and second surface layer.Type: ApplicationFiled: August 30, 2022Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Shogo YONEMURA, Tatsuo SHIBATA, Shogo YAMADA
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Publication number: 20240072754Abstract: In a multilayer filter, first and second resonant circuits are arranged in a direction crossing a stacking direction of a plurality of dielectric layers. An input/output portion includes an input/output port group including an unbalanced port and a pair of balanced ports or an input/output port group including two pairs of balanced ports. The second resonant circuit includes an inductor conductor, a first capacitor conductor, and a second capacitor conductor. The inductor conductor includes first and second ends. The first capacitor conductor is connected to the first end. The second capacitor conductor is connected to the second end. The second dielectric layer has a dielectric constant lower than that of the first dielectric layer. The first and second capacitor conductors are provided in the first dielectric layer. At least a part of the inductor conductor is provided in the second dielectric layer.Type: ApplicationFiled: August 28, 2023Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Masahiro TATEMATSU, Yuta ASHIDA, Shuhei SAWAGUCHI, Keigo SHIBUYA, Tomonori TERUI, Tetsuzo GOTO
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Publication number: 20240074039Abstract: A transient voltage protection device includes an element body formed with a cavity inside, a pair of external electrodes on the element body, and a pair of internal electrodes in the element body. The pair of internal electrodes oppose each other. Each internal electrode is connected to a corresponding external electrode of the pair of external electrodes. The element body includes a first inner surface and a second inner surface. The first and second inner surfaces define the cavity and oppose each other. The pair of internal electrodes are exposed to the cavity and disposed on the first inner surface. In a cross section along a direction in which the first inner surface and the second inner surface oppose each other, the first inner surface includes a contour different from a contour included in the second inner surface.Type: ApplicationFiled: July 20, 2023Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Naoyoshi YOSHIDA, Masato HAYATSU, Shunsuke TAKAHASHI, Sota HIRABA
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Publication number: 20240071655Abstract: A transient voltage protection device includes an element body formed with a cavity inside, a pair of internal electrodes, and a discharge assistance portion. The pair of internal electrodes are disposed in the element body and include edges. The edges include parts opposing each other in a first direction in the cavity. The discharge assistance portion is in contact with the parts of the edges. Each of the edges includes a first end exposed on an outer surface of the element body and a second end located opposite the first end and including a corner. The discharge assistance portion includes a pair of edges opposing each other in a second direction intersecting with the first direction and exposed to the cavity. The part included in each of the edges does not include the corner.Type: ApplicationFiled: August 25, 2023Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Shunsuke TAKAHASHI, Masato HAYATSU, Sota HIRABA, Naoyoshi YOSHIDA
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Publication number: 20240074320Abstract: A piezoelectric element includes a piezoelectric body and first, second, third, and fourth electrode layers disposed in the piezoelectric body. Each of the first, second, third, and fourth electrode layers includes a pair of first electrodes and a pair of second electrodes. The first and second electrodes included in the first electrode layer oppose the second and first electrodes included in the second electrode layer, respectively, with a part of the piezoelectric body. The first and second electrodes included in the second electrode layer oppose the first and second electrodes included in the third electrode layer, respectively, with a part of the piezoelectric body. The first and second electrodes included in the third electrode layer oppose the second and first electrodes included in the fourth electrode layer, respectively, with a part of the piezoelectric body.Type: ApplicationFiled: August 23, 2023Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Shuto ONO, Satoshi SASAKI, Yasuyuki SATOH, Keiji OGUCHI
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Publication number: 20240072676Abstract: A power conversion apparatus includes: a first power terminal; a first arm including a first switching device between a first coupling terminal and a first node, a second switching device between the first node and a second node, and a third switching device between the second node and a second coupling terminal; a second arm including a fourth switching device between the first coupling terminal and a third node, a fifth switching device between the third node and a fourth node, and a sixth switching device between the fourth node and the second coupling terminal; a first inductor between the second node and a fifth node; a second inductor between the fourth and fifth nodes: a first capacitor between the fifth node and the second coupling terminal; a first transformer including a first winding and a second winding; a rectifying circuit; a second power terminal; and a control circuit.Type: ApplicationFiled: March 30, 2021Publication date: February 29, 2024Applicant: TDK CORPORATIONInventor: Naoyuki ISHIBASHI
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Publication number: 20240072239Abstract: A laminated body contains a first metal layer containing copper and a second metal layer containing nickel and directly laminated on the first metal layer. A full width at half maximum of an X-ray diffraction peak having the maximum intensity among at least one X-ray diffraction peak derived from a nickel-containing crystal in the second metal layer is 0.3° or more and 1.2° or less.Type: ApplicationFiled: December 13, 2021Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Yuhei HORIKAWA, Makoto ENDO, Takuya KAKIUCHI, Miyuki YANAGIDA, Yuki NAITO, Takahiro TASHIRO
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Publication number: 20240071693Abstract: A high voltage capacitor includes a pair of capacitors; a common conductor, and a pair of individual conductors. Each of the pair of capacitors includes an element body having a columnar shape with a first direction as an axial direction, and including a first side surface and a second side surface facing away each other in a second direction orthogonal to the first direction, a first electrode disposed on the first side surface and electrically connected to a corresponding individual conductor of the pair of individual conductors; and a second electrode disposed on the second side surface and electrically connected to the common conductor. The pair of capacitors is disposed in such a way that the first electrodes face each other in the second direction. The common conductor surrounds the pair of capacitors and the pair of individual conductors when viewed from the first direction.Type: ApplicationFiled: July 19, 2023Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Yuta KAMO, Hisashi TANAKA
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Publication number: 20240068888Abstract: A detection device includes a base plate, a piezoelectric element disposed on the base plate with an insulating member therebetween and generating a pressing force corresponding to an electromotive force, an electrostatic capacitance sensor detecting an electrostatic capacitance of the base plate, a wiring member (first wiring member) electrically connected to the piezoelectric element, and a wiring member (second wiring member) electrically connected to the electrostatic capacitance sensor.Type: ApplicationFiled: July 11, 2023Publication date: February 29, 2024Applicant: TDK CORPORATIONInventor: Takashi KATO
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Publication number: 20240068897Abstract: There is provided a sensor member capable of suitably preventing a problem such as the intrusion of moisture or the like through an interface between an electrode and a protective film. A sensor member includes: a protected portion provided on one surface of a metal base and including a detection portion; a protective film including a first protective film portion having a first thickness and a second protective film portion having a second thickness thicker than the first thickness and formed at an opening peripheral edge of an opening leading to the protected portion, and covering at least a part of the protected portion from above; and an electrode portion including a first electrode portion disposed in the opening and connected to the protected portion, and a second electrode portion connected to the first electrode portion at an outer peripheral edge of the first electrode portion and formed on the second protective film portion.Type: ApplicationFiled: August 23, 2023Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Masanori KOBAYASHI, Ken UNNO, Tetsuya SASAHARA, Tetsuo HATA
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Publication number: 20240074326Abstract: A magnetoresistance effect element includes a laminated body having a first ferromagnetic layer, a second ferromagnetic layer, and a nonmagnetic layer located between the first ferromagnetic layer and the second ferromagnetic layer, a first wiring connected to the laminated body, a sidewall insulating layer configured to cover at least a part of a side surface of the laminated body, a first electrode connected to a side of the laminated body opposite to the first wiring, and a second electrode and a third electrode provided on both sides of the laminated body with the sidewall insulating layer sandwiched therebetween, sandwiching the laminated body, and connected to the first wiring.Type: ApplicationFiled: March 12, 2021Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Yugo ISHITANI, Tomoyuki SASAKI
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Publication number: 20240068846Abstract: A magnetic sensor includes a bridge circuit including a first arm and a second arm, a first substrate, and a second substrate. The first arm is provided on the first substrate. The second arm is provided on the second substrate. The first arm includes a first resistor and a second resistor connected in series. The second arm includes a third resistor and a fourth resistor connected in series. The second substrate is located at a position away from the first substrate so that a phase of a resistance of the second arm when a target magnetic field changes periodically is different from that of a resistance of the first arm when the target magnetic field change periodically.Type: ApplicationFiled: August 9, 2023Publication date: February 29, 2024Applicant: TDK CORPORATIONInventor: Yongfu CAI
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Publication number: 20240071662Abstract: The metal magnetic powder includes Co as a main component, and an average particle size (D50) of 1 nm to 100 nm. An X-ray diffraction chart of the metal magnetic powder has a first peak that appears in a range of a diffraction angle 2? of 41.6±0.3°, and a second peak that appears in a range of a diffraction angle 20? of 47.4±0.3°. When a full width at half maximum of the first peak is set as FW1, and a full width at half maximum of the second peak is set as FW2, a ratio (FW2/FW1) of FW2 to FW1 is 1 to 5.Type: ApplicationFiled: August 25, 2023Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Kyohei TAKAHASHI, Hiroshi ITO, Isao KANADA
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Publication number: 20240068891Abstract: There is provided a sensor member with a small risk of damage. A sensor member includes: a membrane; a protective film covering a part of the membrane; and an electrode portion connected to the membrane. The electrode portion 5 covers at least a part of the protective film.Type: ApplicationFiled: August 23, 2023Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Masanori KOBAYASHI, Ken UNNO, Tetsuya SASAHARA, Tetsuo HATA, Lucie OUEDRAOGO
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Publication number: 20240071659Abstract: A metal magnetic powder includes: metal nanoparticles having an average particle size (D50) is 1 nm to 100 nm, and a main phase of hcp-Co; and an additive elements ? including at least one of Fe, Ni, and Cu.Type: ApplicationFiled: August 25, 2023Publication date: February 29, 2024Applicant: TDK CORPORATIONInventors: Isao KANADA, Hiroshi ITO, Kyohei TAKAHASHI
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Patent number: 11915847Abstract: A dust core includes a metal magnetic material and a resin. Fine particles exist on a surface of the dust core.Type: GrantFiled: March 8, 2018Date of Patent: February 27, 2024Assignee: TDK CORPORATIONInventors: Ryoma Nakazawa, Takeshi Takahashi
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Patent number: 11915852Abstract: An electronic component according to an aspect of the present disclosure includes an element body and a terminal electrode. The element body includes an outer surface provided with a depression. The terminal electrode is disposed on the element body. The terminal electrode includes a first electrode portion and a second electrode portion. The first electrode portion is disposed in the depression. The second electrode portion protrudes from the depression. The second electrode portion is thicker than the first electrode portion.Type: GrantFiled: July 7, 2020Date of Patent: February 27, 2024Assignee: TDK CORPORATIONInventors: Yuya Ishima, Shinichi Kondo, Kosuke Ito, Shingo Hattori, Kazuya Tobita, Noriaki Hamachi, Atsushi Moriya
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Patent number: 11914008Abstract: The magnetic sensor can prevent an increase of a positional detection error of a subject/object even in the case of applying an external magnetic field with a magnetic field intensity exceeding a predetermined range. A magnetic sensor is equipped with a magnetoresistive effect element (MR element) 11 that can detect an external magnetic field and a soft magnetic body shield 12. The soft magnetic body shield(s) 12 are/is positioned above and/or below the MR element 11 in a side view, and the size of the MR element 11 is physically included within a perimeter of the soft magnetic body shield 12.Type: GrantFiled: April 5, 2023Date of Patent: February 27, 2024Assignee: TDK CorporationInventors: Keisuke Uchida, Hiraku Hirabayashi